@neo4j/graphql
Version:
A GraphQL to Cypher query execution layer for Neo4j and JavaScript GraphQL implementations
47 lines • 2.08 kB
JavaScript
;
/*
* Copyright (c) "Neo4j"
* Neo4j Sweden AB [http://neo4j.com]
*
* This file is part of Neo4j.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.PopInputField = void 0;
const cypher_builder_1 = __importDefault(require("@neo4j/cypher-builder"));
const ParamInputField_1 = require("../ParamInputField");
class PopInputField extends ParamInputField_1.ParamInputField {
constructor({ attribute, attachedTo, inputValue, }) {
super({ attribute, attachedTo, inputValue });
}
getPredicate(queryASTContext) {
const expr = this.getLeftExpression(queryASTContext);
return cypher_builder_1.default.apoc.util.validatePredicate(cypher_builder_1.default.isNull(expr), `Property ${this.attribute.name} cannot be NULL`);
}
getRightExpression(queryASTContext) {
const rightVariable = super.getParam();
const rightExpr = cypher_builder_1.default.minus(rightVariable);
const leftExpr = this.getLeftExpression(queryASTContext);
return new cypher_builder_1.default.Raw((context) => {
const leftExprCompiled = context.compile(leftExpr);
const poppedValueCompiled = context.compile(rightExpr);
return `${leftExprCompiled}[0..${poppedValueCompiled}]`;
});
}
}
exports.PopInputField = PopInputField;
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